Hook up BackgroundFetchServiceImpl::Fetch() to start a fetch

content/browser/background_fetch/background_fetch_event_dispatcher_unittest.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/background_fetch/background_fetch_event_dispatcher.h"
 
 #include <stdint.h>
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 167 matching lines @@
   ASSERT_TRUE(embedded_worker_test_helper()->last_fetches().has_value());
   EXPECT_EQ(fetches.size(),
             embedded_worker_test_helper()->last_fetches()->size());
 
   histogram_tester_.ExpectUniqueSample(
       "BackgroundFetch.EventDispatchResult.FailEvent",
       BackgroundFetchEventDispatcher::DISPATCH_RESULT_SUCCESS, 1);
 
   fetches.push_back(BackgroundFetchSettledFetch());
 
-  embedded_worker_test_helper()->set_fail_fail_event(true);
+  embedded_worker_test_helper()->set_fail_fetch_fail_event(true);
 
   BackgroundFetchRegistrationId second_registration_id(
       registration_id.service_worker_registration_id(),
       registration_id.origin(), kExampleTag2);
 
   {
     base::RunLoop run_loop;
     event_dispatcher_.DispatchBackgroundFetchFailEvent(
         second_registration_id, fetches, run_loop.QuitClosure());
 
@@ skipping 73 matching lines @@
   histogram_tester_.ExpectBucketCount(
       "BackgroundFetch.EventDispatchResult.FetchedEvent",
       BackgroundFetchEventDispatcher::DISPATCH_RESULT_CANNOT_DISPATCH_EVENT, 1);
   histogram_tester_.ExpectUniqueSample(
       "BackgroundFetch.EventDispatchFailure.Dispatch.FetchedEvent",
       SERVICE_WORKER_ERROR_EVENT_WAITUNTIL_REJECTED, 1);
 }
 
 }  // namespace
 }  // namespace content